Electronic cigarette casing



FIG. 1 is a perspective view of the front, top, and right side view of an electronic cigarette casing showing my design;

FIG. 2 is a perspective view of the back, bottom, and left side view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top side view thereof; and,

FIG. 7 is a bottom side view thereof. 

CLAIM The ornamental design for an electronic cigarette casing, as shown and described. 